Pen Trading and Peekaboo at President Trump's 1st Law Signing

He signed Cabinet nominations in the President's Room.

"You know he's going to be terrific, and he's going to be approved, but I'll give you a different one," Trump told Pelosi. "You want Elaine?"

"You know what, the leader should have Elaine," Trump agreed, giving the pen to McConnell.

According to Time, it's customary for the president to use multiple pens to sign important legislation. It's a tradition that dates back to at least President Franklin Delanor Roosevelt.